EGR Valve: Testing and Inspection

EGR VALVE INSPECTION [L3]

On-vehicle Inspection

1. Verify that the buzzing sound (valve operation sound) is heard from the EGR valve when engine cranking.

- If the buzzing sound is not heard, perform the resistance inspection.

Resistance Inspection

1. Remove the battery cover. Removal and Replacement

2. Disconnect the negative battery cable.

3. Disconnect the EGR valve connector.

4. Measure the resistance between the EGR valve terminals.






- If within the specification, perform out the "Circuit Open/Short Inspection".
- If not within the specification, replace the EGR valve. Service and Repair
Standard





Circuit Open/Short Inspection

1. Disconnect the PCM connector. Service and Repair

2. Inspect the following wiring harnesses for open or short circuit (continuity check).






Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

- EGR valve terminal A and PCM terminal 2BA
- EGR valve terminal B and PCM terminal 2AT
- EGR valve terminal C and main relay terminal C
- EGR valve terminal D and main relay terminal C
- EGR valve terminal E and PCM terminal 2AX
- EGR valve terminal F and PCM terminal 2AW

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.

- EGR valve terminal A and body ground
- EGR valve terminal A and power supply
- EGR valve terminal B and body ground
- EGR valve terminal B and power supply
- EGR valve terminal C and body ground
- EGR valve terminal D and body ground
- EGR valve terminal E and body ground
- EGR valve terminal E and power supply
- EGR valve terminal F and body ground
- EGR valve terminal F and power supply